The Honda Acty is a legend in the world of kei trucks and vans—compact, reliable, and surprisingly tough. Whether you’re driving an old-school HA2, the ever-popular HA4, or a later HH5/HH6 fuel-injected model, proper maintenance is key to keeping your Acty on the road for years to come.

At Oiwa Garage, we’ve worked on every generation of the Acty, and we’ve put together this complete guide to help you maintain your mini truck or van like a pro.

🧰 Basic Maintenance Schedule (All Acty Models)

Service Interval

Engine Oil & Filter Every 5,000–6,000 km

Air Filter Every 10,000 km

Spark Plugs Every 20,000–30,000 km

Timing Belt Every 100,000 km or 10 years

Transmission Fluid Every 40,000 km

Brake Fluid Every 2 years

Coolant Flush Every 2 years

Valve Adjustment (Carb Models) Every 20,000 km

CV Boots & Axles Inspect every 10,000 km

🔧 Model-Specific Notes

HA2 / HA3 / HA4 (1988–1999) – Carbureted Models

Engine: E05A or E07A, usually carbureted

Common Issues: Carb tuning, vacuum leaks, old distributor caps

Maintenance Tips:

Regularly clean and adjust the carburetor.

Replace ignition parts every 2–3 years.

Use a genuine Honda timing belt kit—cheap kits often fail prematurely.

HH5 / HH6 (1999–2009) – Fuel-Injected Models

Engine: E07Z, EFI (PGM-FI system)

Common Issues: Idle control valve (IACV), O2 sensors, oil seepage

Maintenance Tips:

Keep throttle body clean to avoid idle issues.

Use OEM spark plugs (NGK or Denso recommended).

Inspect coolant hoses—rear-engine layout causes heat buildup.

HA6 / HA7 (2000–2009) – Acty Truck (Mid-Engine EFI)

Similar to HH5/6 but with slightly different cooling setup.

Maintenance Tips:

Cooling system is crucial—flush every 2 years.

Easy access to valve cover makes valve adjustment less painful.

Replace rear shocks regularly—they wear faster under load.

🔍 Key Maintenance Areas

✅ 1. Engine Oil & Filter

Use 5W-30 or 10W-30 depending on your climate. Stick with quality filters (OEM or Wix/Nippon). Don’t skip changes—it’s the lifeblood of your E07 engine.

✅ 2. Cooling System

Overheating is the Acty’s Achilles heel, especially in HA6/HH5 models.

Flush the radiator every 2 years.

Replace the thermostat and fan switch if you notice creeping temps.

Use Honda Blue coolant or an equivalent phosphate-free mix.

✅ 3. Brakes

Inspect drums and pads every 10,000 km.

Check for fluid leaks around the master cylinder and rear wheel cylinders.

Replace old rubber brake lines—they degrade after 15–20 years.

✅ 4. Drivetrain

Manual transmissions love fresh 75W-90 gear oil.

4WD models: Check and top up rear diff oil every 40,000 km.

Check prop shaft U-joints for play or vibration.

✅ 5. Electrical

Clean battery terminals and check ground straps.

Replace old fuses with correct amperage.

Lights dimming? Alternator may be tired—check charge voltage (~13.8–14.2V).

🛠️ Top Preventative Upgrades

LED Headlights: Brighter and more efficient.

Stainless Brake Lines: Better pedal feel, less fade.

Upgraded Radiator: Especially for heavy-use or warmer climates.

Modern Stereo & USB Ports: For comfort on long drives.

Digital Temp Gauge: Keep an eye on engine temp before it’s too late.

📦 Need Parts?

At Oiwa Garage, we stock OEM and high-quality aftermarket parts for every Acty generation. Whether you’re doing routine maintenance or tackling a full rebuild, we’ve got what you need—plus the expertise to match.

👉 [Shop Now] or contact us for parts guidance by model and VIN.

💬 Final Thoughts

The Honda Acty may be small, but with proper maintenance, it’s a giant in reliability. Whether you’re hauling tools, exploring mountain trails, or just enjoying the JDM life, a well-maintained Acty is a joy to own.

Got questions about your model or looking for a service checklist? Drop us a comment or message—we’re here to help.